Achromatic Lenses

issue date：2016-3-31 15:35:44 visit frequency：3402

An achromatic
lens or achromat is a lens that is designed to limit the effects of chromatic
and spherical aberration. Achromatic lenses are corrected to bring two
wavelengths (typically red and blue) into focus in the same plane.

The most
common type of achromat is the achromatic doublet, which is composed of two
individual lenses made from glasses with different amounts of dispersion.
Typically, one element is a negative (concave) element made out of flint glass
such as F2, which has relatively high dispersion, and the other is a positive
(convex) element made of crown glass such as BK7, which has lower dispersion.
The lens elements are mounted next to each other, often cemented together, and
shaped so that the chromatic aberration of one is counterbalanced by that of
the other.

Achromatic Lenses are used to minimize or
eliminate chromatic aberration. The achromatic design also helps minimize
spherical aberrations. Achromatic Lenses are ideal for a range of applications,
including fluorescence microscopy, image relay, inspection, or spectroscopy. XF
Photonics Co.,Ltd provide a large variety
kinds of specifications according to clients’ request
or Personalized customization for Achromatic Lenses. Our Achromatic
Lenses are available in a range of coating or substrate options.
Anti-reflection coatings range from the Ultraviolet (UV) to the Infrared (IR).

Achromatic Lenses

General
precision

High
precision

Material

According
to different designs

Diameter

2
to 200mm or customize

Dimension
tolerance

+0.0,-0.2mm

+0.0,
-0.01mm

tc
tolerance

±0.2mm

±0.02mm

Clear
aperture

>85%

>95%

Surface
quality

60-40

20-10

Flatness

＜1.5λ@632.8nm

＜λ/4 @632.8nm

Centration

3
arc min

30
arc sec

Coating

Uncoated,AR,HR,PR
Coating,etc

ROHS

Compliant

The followings are available in stocks or customize per request specification: